Azo dyestuffs containing a phenylpiperidine coupling component

ABSTRACT

AZO DYESTUFFS WHICH CONTAIN AT LEAST ONE RESIDUE OF A COUPLING COMPONENT OF FORMULA   -(1,4-PHENYLENE)-N&lt;(-CH2-CH2-C(&lt;)-CH2-CH2-)   WHEREIN THE CARBON ATOM WHICH IS LOCATED IN THE 4-POSITION OF THE AZACYCLOHEXANE RING IS BONDED TO 1 TO PREFERABLY 2 IDENTICAL OR MUTUALLY DIFFERENT POSITISING GROUPS WHICH ARE CAPABLE OF RENDERING AN ADJACENT METHYLENE GROUP ACID.

United States Patent() US. Cl. 260-156 2 Claims ABSTRACT or THE DISCLOSURE Azo dyestufi's which contain at least one residue of a coupling component of formula OHz-GHz wherein the carbon atom which is located in the 4-position of the azacyclohexane ring is bonded to- 1 or preferably 2 identical or mutually different positivising groups which are capable of rendering an adjacent methylene group acid.

The present invention relates to azo dyestuffs which contain at least one residue of a coupling component of formula p v wherein the carbon atom which is in the 4-position of the azacyclohexane ring is bonded to 1 or preferably 2 identical or different positivising groups which are able to render an adjacent methylene group acid.

Positivising groups which are able to activate an adjacent methylene group, that is to say to render it acid,

according to F. Klages Lehrbuch der organischen Chemie, Volume II, pages 116-118, Berlin 1964, possess a +F effect or positivising field effect. A list of compounds with methylene groups which have been rendered I acid is to be found in Gould Mechanismus und Struktur in der organischen Chemie, page 436, Weinheim 1962.

Suitable monovalent or divalent groups which exert an acid-rendering effect are for example the nitrile,vcarbalkoxy, carboalkyleneoxy, arylsulphonyl, aryloxycarbonyl, alkylcarbonyl or optionally N-alkylated or -N- arylated carboxylic acid amide groups.

The groups of the formulae COOCH COOC H wherein X denotes a monovalent negative group which renders an adjacent methylene group acid, Y denotes a hydrogen atom or preferably a monovalent negative group which renders an adjacent methylene group acid,

3,663,529 Patented May 16, 1972 and D and A havethe samesignificance as below and denote the dyestuffs of formula group, and X and Y denote the same as above, and Z is a divalent organic residue, especially a hydrocarbon residue which is optionally interrupted by hetero-atoms.

The diazo residues D and D are mainly derived from monocyclic or bicyclic amines of formulae D* NH or D NH such as any desired diazotisable heterocyclic amines which do not contain any acid substituents which confer solubility in water, but. especially from amines which possess a heterocyclic 5-membered ring with 2 or 3 hetero-atoms, above all a nitrogen atom and one or two sulphur, oxygen or nitrogen atoms as hetero-atoms, and negatively substituted aminobenzenes, especially those of formula (1' a l I wherein a denotes a hydrogen or halogen atom, an alkyl or alkoxy group, a nitro, nitrile, carbalkoxy or alkylsulphone group, b denotes a hydrogen or halogen atom or an alkyl, nitrile or trifluoromethyl group, 0' denotes a nitro, nitrile, carbalkoxy or alkylsulphonyl group and d denotes a hydrogen or halogen atom or a nitrile, carboxylic acid ester or canboxylic acid amide group.

As examples, there may be mentioned:

Z-aminothiazole,

2-amino5-nitrothiazole, 2-amino-S-methylsulphonyl-thiazole, 2-amino-5-cyanothiazole, 2-amino-4-methyl-5-nitrothiazole, 2v-amino-4-methylthiazole, 2-amino-4-phenylthiazole,

2-amino-4- (4'-chlorophenylthiazole, 2-amino-4-(4-nitro)-phenylthiazole, 3-aminopyridine, 3-aminoquinoline,

3-aminopyrazole, 3-amino-1-phenylpyrazole, 3-aminoindazole, 3-amino-1,2,4-triazole, 5-methyl-, ethyl-, phenylor benzyl-)-1,2,4-triazole, 3-amino-1-(4-methoxyphenyl)-pyrazole, Z-aminobenzthiazole, 2-amino46-methylbenzthiazole, 2-amino6-methoxybenzthiazole, 2-amino-6-ehlorobenzthiazole, Z-amino-6-cyanobenzthiazole, 2-amino-6-rhodanbenzthiazole, 2-amino-6-nitrobenzthiazole, 2-amino-6-carbethoxybenzthiazole,

2-amino(4- or 6-)methylsulphonylbenzthiazole, 2-amino-1,3,4thiadiazole, 2-amino-l,'3,5-thiadiazole,

2-amino-4-phenylor -4-methyl-1,3,S-thiadiazole, Z-amino-S-phenyl-1,3,4-thiadiazole, 2-amino-3-nitro-S-methylsulphonyl-thiophene, 2-amino-3 ,5 -bis- (methylsulphonyl) -thiophene, 5-amino-3-methylisothiazole,

3 2-amino-4-cyano-pyrazole, 2-(4'-nitrophenyl)-3-amino-4-cyanopyrazole, 3- or -4-aminophthalimide, aminobenzene, l-amino-4-chlorobenzene, l-amino-4-bromobenzene, 1-amino-4-methylbenzene, l-amino-4-nitrobenzene, 1-amino-4-cyanobenzene, 1-amino-4-methylsulphonylbenzene, 1-amino-4-carbalkoxybenzene, l-amino-2,3- or -2,4-

dichlorobenzene, 1-amino-2,4-dibromobenzene, 1-amino-2-methyl-4-chlorobenzene, 1-amino-2-trifluoromethyl-4-chlorobenzene, 1-amino-2-cyano-4-chlorobenzene, l-amino-2-carbomethoxy-4-chlorobenzene, 1-amino-2-carb0methoXy-4-nitrozenzene, 1-amino-2-chloro-4-cyanobenzene, l-amino-2-chloro-4-nitrobenzene, l-amino-2-bromo-4-nitrobenzene, 1-amino-2-chloro-4-carbethoxybenzene, l-amino-Z-chloro-4-methylsulphonylbenzene, l-amino-2-methylsulphonyl-4-chlorobenzene, 1-amino-Z-methylsulphonyl-4-nitrobenzene, 1amino-2,4-dinitrobenzene, l-amino2,4-dicyanobenzene, 1-amino-2-cyano-4-methylsulphonylbenzene, 1-amino-2,6-dichloro-4-cyanobenzene, l-amino-Z,6-dichloro-4-nitrobenzene, 1-amino-2,4-dicyano-6-chlorobenzene, 4-aminobenzoic acid cyclohexyl ester, 1-amino-2,4-dinitro-6-chlorobenzene and especially 1-amino-2-cyano-4-nitrobenzene, and also 1-aminobenzene-2-, -3- or -4-sulphonic acid amides, such as the N-methylamide or N,N-dimethylamide or diethylamide, l-amin-2,3-or -2,4-dibrom-anthraquinone, N,'y-isopropyloxypropyl-2-amino-naphthalene-6- sulphonic acid amide, N,'y-isopropyloxypropyl-1-aminobenzene-2-, -3- or 4- sulphonic acid amide, N-isopropyl-1-aminobenzene-2-, -3- or -4-sulphonic acid amide, N,'y-methoxypropyl-l-amniobenzene-2-, -3- or -4- sulphonic acid amide, N,N-bis(fi-hydroxyethyl)-l-amin0benzene-2-, -3- or 4- sulphonic acid amide, 1-amino-4-chlorobenzene-Z-sulphonic acid amide, and the N-substituted derivatives, 2-, 3- or 4-aminophenylsulphamate, 2-amino-4-, -5- or -6-methylphenylsulphamate, 2- amino-S-methoxy-phenylsulphamate, 3 amino-6-chlorophenylsulphamate, 3-amino 2,6 dichlorophenylsulphamate, 4-amino-2- or -3-methoxyphenylsulphamate, N,N-dimethyl-Z-aminophenylsulphamate, N,N-di-n-butyl-Z-aminophenylsulphamate, N,N-dimethyl-Z-amino-4-clilorophenylsulphamate, N,n-propyl-3-aminophenylsulphamate, N,N-di-n-butyl-3-aminophenylsulphamate, 0(3-aminophenyl)-N-morpholine-N-sulphonate, O(3-aminophenyl)-N-piperidine-sulphonate, N-cycloheXyl-O-(3-aminophenyl)-sulphamate, N N-methylaniline) -O 3-aminophenyl sulphonate, N,N-diethyl-3-amino-6-methylphenylsulphamate, N-ethyleneimine-O- (4-aminophenyl -sulphonate, N,N-dimethyl-4-aminophenylsulphamate, O (n-propyl -O 3-aminophenyl sulphonate, 0,}3-chl0rethyl-O Z-aminophenyl) sulphonate, O-benzyl-O (3-aminophenyl) sulphonate and O-ethyl-O (4-amino-2,6-dimethylphenyl) sulphonate.

4-aminoazobenzenes which can be used as diazo components are for example 4-amino-3-nitroazobenzene, 2,5-dimethoxy-4-aminoazobenzene, 4'-methoxy-4-aminoazobenzene, 2-methyl-4'-methoXy-4-aminoazobenzene, 3,6,4'-trimethoxy-4-aminoazobenzene, 4-chlor-4-aminoazobenzene,

2? or 3'-chlor-4-aminoazobenzene, v 3-nitro-4-amino-2',4'-dichlorazobenzene and 4-aminoazobenzene-4-sulphonic acid amide.

Instead of the abovementioned diazo components which are free of ionic groups which confer solubility in Water, it is also possible to use diazo components which contain fibre-reactive groups, such as for example striazinyl residues which carry 1 or 2 chlorine or bromine atoms on the triazine ring, pyrimidyl residues which carry one or two chlorine atoms and/or one or two arylsulphonyl or alkylsulphonyl groups on the pyrimidine ring, monoor bis-(y-halogen-[i-hydroxypropyl)-amino groups, B halogenethylsulphamyl residues, 6 halogenethoxy groups, B-halogenethylmercapto groups, 2-chloro-benzthiazolyl 6-azo groups, 2-chlorobenzthiazolyl-6-amino groups, 'y-halogeno-13-hydroxy-propylsulphamyl residues, chloracetylamino groups, u,;8-dibromopropionyl groups, vinylsulphonyl groups or 2,3-epoxypropyl groups.

Suitable fire-reactive diazo components are for example N,,8-chlorethyl-3-chlor-4 aminobenzenesulphonamide (hydrochloride) N,,8-chlorethyl-4-aminobenzenesulphonamide (hydrochloride),

3-brom-4-amino-w-chloracetophenone,

N,'y-chloro-fi-hydroxypropyl-4-aminobenzenesulphonamide,

N,/3-chlorethyl-l-amino-4-naphthylsulphonamide,

N, fl-chlorethyl- 1-amino-3 ,5 -dichlorobenzenesulphonamide and 4-('y-chloro-fl-hydroxypropoxy)-aniline.

The groups A and A are preferably residues of formula wherein c and d are hydrogen atoms or methyl, ethyl,

methoxy, ethoxy, phenylthio or phenoxy residues.

The group 0 is preferably bonded in the ortho-position to the azo group and can, in addition to the abovernentioned groups, also denote a chlorine or bromine atom, a trifiuoromethyl grup, an alkylsulphonyl group, preferably a methylsulphonyl group, and an acylamino group which is optionally alkylated, preferably methylated, on the nitrogen atom, in which the acyl residue is the residue of an organic monocarboxylic acid, an organic monosulphonic acid such as methanemonosulphonic, ethanemonosulphonic 'or p-toluenemonosulphonic acid or the residue of a carbamic acid or of a carbonic acid monoester or monoamide, such as phenoxycarbonyl, methoxycarbony] and aminocarbonyl.

The new azo dyestuffs which contain at least one residue of a coupling component of formula /CH2CH2 \C/ CHr-Cfi? are obtained by condensation or by coupling it being optionally possible to quaternise the resulting azo dyestuff if it contains quaternisable nitrogen atoms, especially in the diazo residues.

I MANUFACTURE BY CONDENSATION The manufacture by malonic ester condensation takes place by reacting a dyestulf which possesses at least one N,N bis (fi-halogenethyD-amino, N,N-bis-(fl-arylsulphonyloxyethyl)-amino or N,N bis-([i-alkylsulphonylethyl)-amino group, especially at least one N,N-bis-(flchlorethyl)-amino group, with a compound which contains at least one acid methylene group.

Dyestuffs having a terminal N,N-bis-[;3-(halogen and/ 01' alkyl and/or arylsulphonyloxy)ethyl-]amino group, which are suitable as starting substances for the condensation, are obtained by coupling the corresponding coupling components with the abovementioned diazo components, for example by coupling N,N-bis-(fi-chlorethyl)-aniline with the diazonium compounds of 2,6-dichloro4-nitro-aniline or 5- or 6-nitro-2-aminobenzthiazol.

Suitable compounds for the malonic ester condensation are for example malonic acid diethyl ester, malonic acid dime'thyl ester, malonic acid di-sec.-butyl ester, malonic acid di-tert.-butyl ester, malonic acid monoethyl ester-monoamide, acetoacetic acid ethyl ester, acetoacetic acid amide, acetoacetic acid diethylamide, acetoacetic acid N-phenylamide, barbituric acid, Meldrum acid, indanedione-(1,3), dimedone, malonic acid dinitrile, cyanacetic acid methyl ester, cyanacetic acid ethyl ester, cyanacetic acid butyl ester, cyanacetic acid isobutyl ester, cyanacetamide, cyanacetmethylamide, cyanacetphenylamide, cyanacetdimethylamide, methylsulphonylacetonitrile and phenylsulphonylacetonitrile.

Bifunctional methylene-active compounds can for example be obtained if one of the abovementioned monocarboxylic acid esters is reacted with a glycol, that is to say if for example cyanacetic acid ethyl ester is transesterified with 1,6-hexane-diol or amidated with 1,6-hexamethylenediamine.

The condensation takes place in a manner which is in itself usual, for example in the presence of alkaline earth or alkali alcoholates in the corresponding alcohols, or in the presence of sodium amide and benzene, toluene or dimethylformamide. A further selection of solvents and alkaline catalysts is given in the article by A. C. Cope et al. in Organic Reactions, Volume IX, pages 107-144, I ohn Wiley Sons, New York, 1957. Compare also Fieser and Fieser, Organic Chemistry, Alkylierung von Ketonen, pages 528 to 540, Weinheim 1965.

MAN FAC'I'URE BY COUPLING The dyestuffs are preferably manufactured by coupling a coupling component which contains at least one residue of a N-phenylpiperidine of formula CHz-CHZ wherein A is a p-phenylene residue, X is a monovalent negative acid-rendering group and Y is a hydrogen atom or preferably a monovalent negative acid-rendering group,

such as 4-cyano-4-carbethoxy-N-phenyl-piperidine, 4-cyano-4-carbomethoxy-N-phenyl-piperidine, 4,4-dicarbethoxy-N-phenyl-piperidine, 4-amido-4-carbethoxy-N-phenyl-piperidine, 4,4-dicyano-N-phenyl-piperidine, 4-amido-4-cyano-N-phenyl-piperidine and 4-cyano-4-carbethoxy-N,m-tolyl-piperidine.

Further coupling components of this nature can be obtained by condensation of the methylene-active compounds quoted above with substituted bis-(fi-halogenethy1-, B-alkylenesulphonyloxyethylor B-arylsulphonyloxyethy1-) anilines; these latter compounds are obtained if the appropriate bis (p hydroxyethyl-)anilines are treated with chlorinating agents such as for example phosphorus oxychloride or thionyl chloride, or with sulphonating agents such as p-tosyl bromide, p-benzenesulphonyl chloride or methanesulphonyl chloride. Suitable bishydroxyethylanilines are for example N,N-bis- B-hydroxyethyl -3-acetylamino-aniline, N,N-bisfl-hydroxyethyl) -5-methoxy-ani1ine,

N,N-bis-( [i-hydroxyethyl) -3 ,5 -dimethoxy-aniline, N,N-bisfl-hydroxyethyl) -3,S-dimethylaniline,

N,N-bis- B-hydroxyethyl) -3-chloraniline,

N,N-bis- ,B-hydroxyethyl) -3-trifluoromethyl-aniline and N,N-bis- B-hydroxyethyl) -3-methyl-6-methoxy-aniline.

It is also possible to convert one coupling component into another; for example, 4-carbamido-4-carboethoxy-N- phenyl-piperidine can be obtained from 4-cyano-4-carboethoxy-N-phenyl-piperidine by saponification of the nitrile group in concentrated sulphuric acid.

The diazotisation is performed in a manner which is in itself known, for example in aqueous solution containing mineral acid, using alkali salts of nitrous acid or in concentrated sulphuric acid using nitrosylsulphuric acid.

The coupling can also be performed in a manner which is in itself known, for example in a neutral to acid medium, optionally in the presence of sodium acetate or similar buifer substances which influence the coupling speed or of catalysts such as for example pyridine or its salts.

After the coupling reaction has taken place, the nonquaternised dyestuflfs formed can be separated from the coupling mixture, for example by filtration, since they are practically insoluble in water.

Instead of a single diazo component it is also possible to use a mixture of two or more of the diazo components according to the invention and instead of a single coupling component it is also possible to use a mixture of two or more of the coupling components according to the invention.

If the residues D and/or D of the diazo components contain quaternisable nitrogen atoms such as for example the abovementioned heterocyclic amines of formula D NH and D NH then the dyestuffs can be quaternised and this preferably takes place as the last stage.

The quaternisation is performed by treatment with esters of strong mineral acids or of organic sulphonic acids, such as for example dimethylsulphate, diethylsulphate, alkyl halides, such as methyl chloride, bromide or iodide, aralkyl halides, such as benzyl chloride, esters of low molecular alkanesulphonic acids, such as for example the methyl ester of methanesulphonic, ethanesulphonic or butanesulphonic acid and the alkyl esters of 4-(4- methyl-, 4chloroor 3- or 4-nitro)-benzenesulphonic acid, which form halogen, sulphuric acid half-ester, alkanesulphonic acid or benzenesulphonic acid anions as the anions, preferably with warming in inert organic solvents, for example xylene, carbon tetrachloride, o-dichlorobenzene and nitrobenzene. It is however also possible to use solvents such as acetic anhydride, dimethylformamide, acetonitrile or dimethylsulphoxide. The quaternised dyestuffs preferably contain, as the anion Y-, the residue of a strong acid such as of sulphuric acid or of its half-esters, or a halogen ion, but can also be used as double salts, for example with zinc chloride, or as free bases.

The dyestuffs described above as a rule contain no acid groups which confer solubility in water, especially no sulphonic acid groups, and are therefore sparingly soluble or insoluble in water. if they contain quaternised nitrogen atoms then they are on the other hand soluble in water.

The new dyestuffs, their mixtures with one another and their mixtures with other azo dyestuffs are excellently suited to dyeing and printing synthetic fibres such as for example acrylic fibres or acrylonitrile fibres, polyacrylonitrile fibres and copolymers of acrylonitrile and other vinyl compounds, such as acrylic esters, acrylamides, vinylpyridine, vinyl chloride or vinylidene chloride, copolymers of dicyanethylene and vinyl acetate, as well as (fibres of) acrylonitrile block copolymers, fibres of polyurethanes, polyolefines, cellulose triacetate and 2 /2-acetate, polyamides, such as nylon-6, nylon-6,6 and nylon-12, and especially fibres of aromatic polyesters such as those from terephthalic acid and ethylene glycol or 1,4-dimethylolcyclohexane, and copolymers of terephthalic and isophthalic acid and ethylene glycol.

A further subject of the present invention is therefore a process for dyeing or printing synthetic fibres, especially polyester fibres, which is characterised in that azo dyestuffs which are free of carboxyl and sulphonic acid groups, and which contain at least one residue of a coupling component of formula wherein the carbon atom in the 4-position of the cyclohexane ring is bonded to 2 identical or different positivising groups which are capable of rendering an adjacent methylene group acid, are used.

Deep dyeings of good fastness to light and outstanding fastness to sublimation are obtained.

For dyeing fibres containing ester groups, especially polyester fibres, the non-quaternised new dyestuffs are appropriately used in a finely divided form and dyeing is carried out with the addition of dispersing agents, soap, sulphite cellulose waste lye or synthetic detergents, or a combination of different wetting and dispersing agents. As a rule it is appropriate to convert the dyestuffs, before dyeing, into a dyeing preparation which contains a dispersing agent and finely divided dyestuff in such a form that on dilution of the dyestuff preparations with water a fine dispersion is produced. Such dyestuff preparations can be obtained in a known manner, for example by reprecipitating the dyestulf from sulphuric acid and grinding the suspension thus obtained with sulphite waste lye, and optionally also by grinding the dyestuff in high efiiciency grinding devices in the dry or wet form, with or without addition of dispersing agents during the grinding process.

The new water-insoluble dyestuffs are, because of their fastness to alkali, especially suitable for dyeing according to a so-called thermofixing process, according to which the woven fabric to be dyed is impregnated with an aqueous dispersion of the dyestuff which appropriately contains 1 to 50% of urea and a thickener, especially sodium alginate, preferably at temperatures of at most 60 C., and is squeezed out in the usual manner. Squeezing out is appropriately carried out in such a way that the impregnated goods retain 50 to 100% of their starting weight of dyeing liquid.

In order to fix the dyestuff, the woven fabric impregnated in this way is heated, appropriately after prior drying, for example in a warm stream of air, to temperatures of above 100 C., for example between 180 and 220 C.

Because of the high sublimation fastness of the new water-insoluble dyestuffs, textile articles dyed with them are also suitable for a subsequent permanent press finishing by means of heat-curable resins which are applied to the articles after dyeing, together with latent curing agents, and are cured hot in appropriate moulds.

The thermofixing process just mentioned is of particular interest for dyeing mixed woven fabrics of polyester fibres and cellulose fibres, especially cotton. In this case the padding liquid contains, in addition to the dispersed dyestuffs according to the invention, also dyestuffs which C HrC Hz are suitable for dyeing cotton, especially vat dyestuffs or reactive dyestuffs, that is to say dyestuffs which can be fixed on the cellulose fibre with the formation of a chemical bond, that is for example dyestuffs containing a chlorotriazineor chlorodiazine residue. In the latter case it proves appropriate to add an acid-binding agent, for example an alkali carbonate or alkali phosphate, alkali borate or alkali perborate or their mixtures to the padding solution. When using vat dyestuffs it is necessary to treat the padded woven fabric, after the heat treatment, with an aqueous alkaline solution of a reducing agent usual in vat dyeing. The resulting dyeings are appropriately subjected to a post-treatment, for example by heating with an aqueous solution of an non-ionic detergent.

As a result of their good wool reserve the water-insoluble dyestuffs according to the invention are also excellently suited to dyeing mixed woven fabrics of polyester fibres and wool.

The water-insoluble dyestuffs can also be applied by printing. For this purpose, a printing ink is for example used which in addition to the auxiliary agents which are usual in printing, such as wetting agents and thickeners, contains the finely dispersed dyestuff, optionally mixed with one of the above-mentioned cotton dyestuffs, optionally in the presence of urea and/or an acid-binding agent. Furthermore, the dyestuffs can also be used for dyeing and printing in the form of solutions in organic media, for example in a mixture of of perchlorethylene and'10% of dimethylacetamide for padding polyester or nylon woven fabrics.

The new water-soluble quaternised dyestuffs or dyestuff salts are suitable for dyeing and printing the most diverse fully synthetic fibres, such as for example polyvinyl chloride, polyamide, polyurethane and especially polyacrylic fibres. The quaternised water-soluble dyestuffs are generally not very sensitive to electrolytes and in part show a pronouncedly good solubility in water or polar solvents. Dyeing with the quaternised water-soluble dyestuffs is generally performed in an aqueous, neutral or acid medium, at the boiling point under atmospheric pressure, or in a closed vessel at elevated temperature and elevated pressure. The commercially available levelling agents can be added.

The new dyestuffs are furthermore also suitable for the bulk dyeing of polymerisation products of acrylonitrile, of polyolefines, and also of other plastic compositions, and furthermore for the colouring of oil paints and lacquers. In the case of fibre-reactive water-insoluble dyestuffs an acid-binding agent, for example an alkali carbonate or alkali phosphate, alkali borate or alkali perborate or their mixtures are used, especially when dyeing nylon or basic-modified polyester, polyacryl or polypropylene fibres, in order to fix the dyestuff during or after dyeing.

In the examples which follow the parts, unless otherwise specified, denote parts by weight and the percentages denote percentages by weight.

Instruction 1 4.6 parts of sodium are dissolved in 200 parts of absolute ethanol. The resulting sodium alcoholate solution is treated dropwise with 22.6 parts of cyanacetic acid ethyl ester. Thereafter 21.8 parts of N,N-fl,fi-dichl0r0diethylaniline are added. The mixture is boiled for 12 hours under reflux. The precipitated sodium chloride is separated off by filtration and the bulk of the alcohol is removed by distillation. The residue is cooled and mixed with water. The oil which has separated out is extracted with ether, dried over sodium sulphate and evaporated, and the residual oil is distilled in vacuo. Excess cyanacetic acid ester first passes over, and thereafter 14 parts of 4-cyano-4- carbethoxy-N-phenylpiperidine distil over (boiling point 196 to 198 C./2-3 mm. Hg).

Using. 24.8 parts of N,N-(B,fl'-dichlorethyl)-o-methoxy-aniline, 12 parts of 4-cyano-4-carbethoxy-N-(o-methoxyphenyl)piperidine (boiling point 190 C./2 mm. dropwise to the resulting sodium alcoholate solution.

Hg) are obtained in an analogous manner. I Thereafter 2] .8 parts of N,N-bis(fi-chlorethyl)-aniline are Instruction 2 added. The mixtureis heated for 12 hours under reflux,

. the sodium chloride which has separated out is removed 4.6 parts of sodium were dissolved in 200 parts of abi solute methyl alcohol. The resulting sodium alcoholate 5 y fi i and k of the alcohoi 1S retmved by solution was treated dropwise with 19.8 parts of cyanacedlstluailon' resldue 1S cooled mixed h Water tic acid meth l ester and thereafter 21 8 parts of N N-bis- The 011 which has separaied out E t with ether hlor th anflin were added mixture wasboiled and the ether extract is dried over sodium sulphate. After g j i Hinder rzfiux the Sodium chloride which had evaporation of the solvent, the residue is distilled in vacuo.

10 Excess malodinitrile first passes over, and thereafter 10.0 separated out was filtered off and the bulk of the alcohol o was removed by distillation. The residue is cooled and parts of 4,4 1/ N phenylpiperidine (195 to 200 C./

. 1 mm. Hg) are obtained.

tity o t e correspon ing ami e, at is to Th solvent is eva orated off and the residue 18 distilled a Sma quan in zlacuo Excess fyanacetic acid ester first passes over Say 4"carbc.mam1dO"i'cyanONp 1p i Whlch was Sepand ther'eafier 12 parts of 4 cyan0 4carbometh0Xy Ni arated 01f by filtration and recrystallised from benzene phenylpiperidine pass over. This material is recrystallised (meltmg point 167 to 168 from dilute methanol. Melting point 77-78 C..- Instruction 6 Using 19.8 parts of N,N-bis-(,B-chlorethyl)-o-methoxyaniline, 14 parts of 4-cyano-4-carbomethoxy-N-(o-methoxyphenyl)-piperidine (boiling point 205-207 C./2 mm. Hg; melting point 61 C.) were obtained in an analogous 4.6 parts of sodium metal are dissolved in 200 parts of absolute ethyl alcohol. The resulting sodium alcoholate solution is treated dropwise with 22.6 parts of cyanacetic acid ethyl ester. Thereafter 23.2 parts of N,N-bis-(/3-chlormannerethyl)-m-toluidine are added. The mixture was heated for Instructlon 3 12 hours under reflux, the sodium chloride which had 4.6 parts of Sodium metal ar disso v d by m a s of separated out was removed by filtration and the bulk of 200 parts of absolute ethyl aloo Parts f mal the alcohol was evaporated off. The residue is cooled and add diethyl ester are added P the resulting mixed with water. The oil which has separated out is exsodium alcoholate solution. Thereafter 21.8 parts of N,N- traeted with ether and the ether extract i dried over bis(B-chlorethyl)-aniline are added. The mixture is boiled sodium sulphate. After evaporating off the solvent, the for 14 hours under reflux. The precipitated sodium chloresidual oil was distilled in vacuo. Excess cyanacetic acid ride is removed by filtration and the bulk of the alcohol ester first passed over, followed by 14 parts of 4-cyano-4- is distilled off. The residue 'is cooledand mixed with carbethoxy-N-m-tolylpiperidine (boiling point 195 to 200 water. The oil which has separated out is extracted with C./2 mm. Hg). After recrystallisation from dilute ethaether and the ether extract is dried over sodium sulphate. nol the product has a melting point of 5l 52 C.

The solvent is removed by distillation and the residual The phenylpiperidines mentioned in column 3 were oil is distilled in vacuo. Excess diethyl malonate first passmanufactured in an analogous manner from the starting es over, followed by 11 parts of 4,4d1carbethoxy-N-phencomponents mentioned in columns 1 and 2, unless otherylpiperidine. Wise stated.

1 8,fl-Dlchloro-diethy1-m- Cyanacetic acid methyl 4-carbomethoxy-4-eyano-1-(3-to1yDpiperdine, boiling point 195-200 O./1-2mm.

toluidine. ester. 7 Hg.

2 4-earbomethoxylcyano-Lphenylpiperidine was dissolved in an excess of concentrated sulphuric acid and left to stand for 16 hours at room temperature. The solution was poured into ice water, rendered alkaline, and the l cai'bamoyl--earbometlioxy-l-phenyl-piperdine which had separated out wasreerystallised from water, melting point 142-153 C.

3 8,fl-Diehlorodiethylaniline. Acetoacetanilide 4-acety1-4-phenylcarbamoyl-l-phenylpiperidine, melting point 151-152 'O.

4.-.": do Acetoacetle acid ethyl ester- 4acctyl1carbethoxylphenylpiperidine, boiling point 205 -210 (3.]3 mm. Hg.

5. kacetyldcarbethoxy-l-phenylpiperidine was heated for 13 hours to 180 C. in an autoclave with: an excess of diethylaniine. 4-acetyl-4- (N,N-d.iethylcarbamoyl)-1-phenylpiperid1ne, boiling point 185 C./1 mm. Hg was obtained. 6 B,fl-Dichlorodiethylaniline Phe l'llylsulphonylacetoni- 4-cyano-a-phenylsulplionyl-l-plienylpipcridine, melting point Nil-163 0.

7 -do Cyanaeetanilide 4-cyauo4-phenylcarbamoyl-l phenylpipcridine, melting point 179-180? C.

8 N,N-bis(B :hlorethyl)-N- Cyanacetie acid ethyl ester 1-0yano-4-earbethoxy-l (3 acetylamiiiopheriyl)piperidine, melting point 140- acetyl-m-phenylenedi- 141 O. amine.

9 do Cyatnacetic acid methyl -c sgr wkcarbomethoxy-l-(S-acetylaminophenyl)piperidine, melting point 153- es er. r

10 4-carbethoxy-4-eyano-l-phenylpiperidine and an equivalent quantity of diaminoethane (relative to the earboethoxy groups) were heated to 180 C. for 8-10 hours in a steel autoealve. After working-up, 1,2 bis-(l-phenyli-eyanoi earboxamido(ethane, melting point 252253 C., was obtained. 1

11 9,-1D i(c1l 1l0rodiethy1-m- Malodinitrile. .4.-. 4,4-dicyai10-1-m-toluylpiperidlne, boiling point 210-215 0J3 mm. Hg.

o m me. i

Instruction 4 EXAMPLE 1 ip 3 52 g i 'g gf 'g fifi2ggfifggg 2.16 parts of 2-chloro-4-nitroaniline are diazotised at 3 for 8 hours at room tem erature i Solution room temperature with a mixture of 20 parts by volume of g zgq y poured into ice Wafer and llendered alka concentrated sulphuric acid and 1 part of sodium nitrite. The excess nitrous acid is destro ed with urea and the line with sodium carbonate. After filtration, a residueis y reaction mixture is filtered. The resiulting solution is cou- E 2 g i g if g f 9 5 pled at 5 to 10 c. with 3.23 parts of 4-cyano-4-carbeth- Parts 0 fi i g E e oxyeny oxy-N-phenylpiperidine in a mixture of 40 parts of alco Plpendme of hol Hg point T hol and 200 parts of water. The solution was stirred for 7 Instructlon 5 hours until the coupling was complete. The pH-value is 4.6 parts of sodium are dissolved in 200 parts of absothen adjusted to 4 to 5 with 4 N sodium acetate solution lute ethyl alcohol. 13.2 parts of malodinitrile are added at a temperature below 10 C. and the dyestufi is subsequcntly filtered off and washed with a large amount of water; if necessary, the dyestuff is reprecipitated from acetone. The resulting dyestufi corresponds to the formula 12 dyes polyester fibres in reddish-orange shades having excellent fastness properties.

If the phenylpiperidines mentioned in column H are coupled as above with the diazonium compounds of the 5 amines mentioned in column I, dyestuffs are obtained which dye polyester fibres in the shades mentioned in column III.

III

Thermofix No. I II HT process process UN 1 2,4-dinitro-fiehlorauilinc Bluish-tingcd Bluish-tingcd N H red. red.

COOC2H 2 Z-mcthylsulphonyl--nitro-auiline Same as above Red Red. 3 2, t-dinitro-fi-bromaniline d Bluigh-tinged Red.

re 4 2,4-dinitr0-anilinc- ..do Red Red. 5 2-chloro-4-methylsulphonyl-aniline do Orange Orange.

and dyes polyester fibres in red shades having excellent 2 fastness properties.

Dyeing instruction (HT-process) 1 part of the dyestuff obtained above is ground wet with 2 parts of a 50% strength aqueous solution of the sodium salt of dinaphthylmethanedisulphonic acid and dried.

This dyestutf preparation is stirred with 40 parts of a strength aqueous solution of the sodium salt of N- benzyl-a-heptadecyl-benzimidazoledisulphonic acid and 4 parts of a strength acetic acid solution are added. 4000 parts of a dyebath are thereafter prepared by dilution with water.

100 parts of a cleaned polyethylene terephthalate fibre material are introduced into this bath at C., the temperature is raised to 120 to 130 C. in half an hour and dyeing is carried out for one hour in a closed vessel at this temperature. Thereafter the material is well rinsed. A red dyeing of excellent fastness to light and to sublimation is obtained.

Unless otherwise specified, the shades mentioned in the examples were obtained according to the HT-process.

EXAMPLE 2 dyes polyester fibres in bluish-tinged red shades having very good fastness properties.

EXAMPLE 3 2.6 parts of 2,6-dichloro-4-nitroaniline are diazotised as in Example 1 and the filtered solution of the diazonium salt is coupled with 3.23 parts of 4-cyano-4-carbethoxy-N- phenylpiperidine analogously to Example 1. The resulting dyestutf of formula COOCzHs Dyeing instruction (Thermofix process) 20 parts of the dyestufr according to Example 3, Table No. 1, are ground with 140 parts of water containing 40 parts of sodium dinaphthylmethanedisulphonate.

A padding liquor is prepared from 200 parts of the 30 above dyestuif preparation, 100 parts of carboxymethylcellulose (4% strength aqueous solution) and 700 parts of water, by stirring the dyestuif preparation described above into the pre-diluted thickener by means of a rapid stirrer and subsequently adjusting the mixture to a pH- value of 6 by means of 80% strength acetic acid. A woven fabric of polyester fibres is padded at 30 C. in this liquor, squeezed so as to retain and is subsequently dried at to C. The woven fabric is then heated to 210 C. on a stenter frame for 60 seconds and is subsequently 0 washed hot and well rinsed with cold Water. A Woven fabric which is dyed bluish-tinged red and has good fastness properties is obtained.

EXAMPLE 4 2.16 parts of 2-chloro-4-nitroaniline are diazotised at room temperature as in Example 1 and the filtered solution of the diazonium compound is coupled with 3.05 parts of 4-cyano-4-carbomethoxy-N-phenylpiperidine as in Example 1. The resulting dyestulf of formula dyes polyester fibres in red shades having excellent fastness properties.

COOCH;

EXAMPLE 5 2.1 parts of 2-cyano-4-nitroaniline are diazotised as in Example 1 but with the addition of 5 parts by volume of 60 acetic acid. The filtered solution of the diazonium salt is coupled with 3.05 parts of 4-cyano-4-carbomethoxy-N- phenylpiperidine in the manner described in Example 1. The resulting dyestuff of formula C O O C H;

dyes polyester fibres in bluish-tinged red shades having excellent fastness properties.

EXAMPLE 6 2.6 parts of 2,6-dichloro-4-nitroaniline are diazotised in the manner described in Example 1. The filtered solution of the diazonium compound is coupled with 3.05

13 parts of 4-cyano-4-carbomethoxy-Nphenylpiperidine as in Example 1. The resulting dyestulf of formula i C N A) C O O C H;

14 tion of the diazonium compound is coupled with 3.45 parts of 4-carbonamido-4-carbethoxy-N-phenylpiperidine as in Example 1. The resulting dyestuif of formula dyes polyester fibres in red shades having excellent fastness properties.

COOCzHs EXAMPLE 10 2.1 parts of 2-cyano-4-nitroaniline are diazotised as in Example 1 but with the addition of 5 parts by volume of acetic acid and the filtered solution of the diazonium com- N o. I II CN 1 ZA-clinitro-aniline Q H o o on.

III

HT process process Bluish-tinged Bluish-tinged red. red.

2.. 2,4-dinitro-6-chl0reniline Same as above D0. 3 2,4-dinitr0-6-bromani1ine .do Do. 2-methylsulphonyl-4-nitr0 D0. 2-ehlorot-4-nitroaniline 2,6-dichl0ro-4-nitroaniliue orange. 7 -nitro-2-amin0-thiazole (the heterocyclic ..d0 Blush-tinged diazo component is diazotised in the violet. presence of acetic acidzpropionie a id 8 4-nitroani1ine .d0 Reddish- Reddishtinged tinged orange. orange. 2-br0mo-4-nitr0-6-cyan-aniline do Claret Claret. 2-chl0roi-methylsulphonyl-aniline .d0 Orange Orange.

EXAMPLE 7 pound is coupled with 3.45 parts of 4-carbonanndo-4- 1.73 parts of 2-chloro-4-nitroaniline are diazotised as in Example 1. The filtered solution of the diazonium compound is coupled with 3.05 parts of 4,4-dicarbethoxy-N- phenylpiperidine as in Example 1. The resulting dyestufi of formula o o o 0211;,

dyes polyester fibres in red shades having excellent fastness properties.

EXAMPLE 8 C o 0 CH 0 O O CzHs CN dyes polyester fibres in claret-red shades having excellent fastness properties.

1 EXAMPLE 9 2.16 parts of 2-chloro-4-nitroaniline are diazotised at room temperature as in Example 1 and the filtered solucarbethoxy-N-phenylpiperidine in the manner described in Example 1. The resulting dyestuff of formula C O N H:

dyes polyester fibres according to the HT-process in violetred shades and according to the thermofixing process in claret-red shades having excellent fastness properties.

EXAMPLE 11 2.6 parts of 2,6-dichloro-4-nitroaniline are diazotised as in Example 1 and the filtered solution of the diazonium salt is coupled with 3.45 parts of 4-carbonamido-4-carbethoxy-N-phenylpiperidine as in Example 1. The resulting dyestufif of formula COOC H CONH:

COOC2H III Thermofix No. I II HT process process 1 2,4-dinitro6-chlor-aniline 0 ON H1 H Reddish- Reddishviolet. violet. C 0 0 0211 2 2methylsulphonyl--nitreanlline Same as above do D0. 3.--. 2,4-dinitro-auilina... do Claret Claret. 4 e-methylsulphonylfl do Reddish- Reddishorange. orange.

15 16 EXAMPLE 12 4-carbethoxy-N-m-tolylpiperidine as in Example 1. The

1.73 parts of 2-chloro-4-nitroaniline are diazotised in resumng dyestufi of formula the manner described in Example 1 and the filtered solu- 01 tion of the diazonium salt is coupled with 2.11 parts of I ON 4,4-dicyano-N-pheny1piperidine as in Example 1. The re- Q O@ COOCzHs 01 H d sulting dyestuff of formula CN dyes polyester fibres in yellowish-red shades having ex- CN cellent fastness properties. 01 EXAMPLE l6 dyes polyester fibres in red shades having excellent fast- 2.1 parts of 2-cyano-4-nitroaniline are diazotised as in ness properties. Example 1 but with the addition of 5 parts by volume of EXAMPLE 13 5 acetic acid. The filtered solution of the diazonium com- 2.1 parts of 2-cyano-4-nitroaniline are diazotised as Pound is q f with parts of 4'cyano'4'carl?ethoxy' described in Example 1 but with the addition of 5 parts i g gi as m Example The resultmg by volume of acetic acid. The filtered solution of the di- 5 u 0 orm azom'um compound is coupled with 2.64 parts of 4,4-di- 0N cyano-N-phenylpiperidine. The resulting dyestuif of for- N=N 1 mula COOCzH lN H excellent fastness properties. 25 If the phenylpiperidines mentioned in column II are coupled as above with the diazonium compounds of the y Polyester fibres according to the PIT-Process in red amines mentioned in column I, dyestuffs are obtained CN OzNC N=N-C dyes polyester fibres in bluish-tinged red shades having ON a shades and according to the thermofixing process in bluishhich dye polyester fibres in the shades mentioned in tinged red shades having excellent fastness properties. column III,

III

Thermofix No. I II HT process process 1 Z-metliylsulphonyl-initro-aniline ON N H Blulsh- Blulshtinged red. tinged red. l C O 0 C211; CH3

2 2,4-dlnitro-6chior-aniline-;;-;: Same as above.-.-;..'.;.-; .1-;:;;; Reddlsh- Reddlshviolet. violet. 3 2.4-din1tro-anlllne e r 4 do Bluish- Bluishtinged red. tinged red. 4 Z-chloro-4-methylsulphonyi-aniline n Reddish- Reddishorange. orange. 5 Z-methoxy-tnitronilmn do Yellowish Yellowish red. red. 6 2,4dlnltro6bromaniline ..do Reddish Reddisll violet. violet. 7 2-methyl-4-nitro-aniline... do Yellowish Yellowish re red.

EXAMPLE 14 EXAMPLE 17 2.16 parts of 2-chloro-4nitroaniline are diazotised as in 2.16 parts of 2-chloro-4-nitro-aniline were diazolised as Example 1 and the filtered solution of the diazonium salt in Example 1 and coupled with 3.6 parts of 4-cyano-4- is coupled with 3.1 parts of 4-cyano-4-carbethoxy-N-m- 6 carbethoxy-N-(o-methoxyphenyl)-piperidine. The resulttolylpiperidine as in Example 1. The resulting dyestufi of ing dyestuif of formula formula dyes polyester fibres in yellowish-tinged red shades (HT process) having excellent fastness properties.

EXAMPLE 15 EXAMPLE 18 2.6 parts of 2,6-dichloro-4-nitroani1ine are diazotised as 2.1 parts of 2-cyano-4-nitro-aniline are diazotised as indicated in Example 1 and the filtered solution of the in Example 1 but with the addition of 3 parts by volume diazonium compound is coupled with 3.4 parts of 4-cyanoof acetic acid and are coupling with 3.6 parts of 4-cyanodyes polyester fibres in red shades having excellent fastness properties.

4-carboethoxy-N-(o-methoxyphenyl)-piperidine. The re- EXAMPLE 20 sultmg dyesmfi of formula 2.1 parts of 2-cyano-4-nitroaniline are diazotised as in ON Example 1 but with the addition of 3 parts by volume of "Q H acetic acid and are coupled with 3.42 parts of 4-cyano-4- 00002115 5 carbomethox'y-N-(o-methoxyphenyl)-piperidine. The re- ON OCH! sulting dyestutf of formula dyes polyester fibres in bluish-tinged red shades (HT- process) having excellent fastness properties.

CN EXAMPLE 19 1o o.N-O N=N N: n X 2.16 parts of 2-chloro-4-nitroaniline are diazotised as JJN 000011 in Example 1 and coupled with 3.42 parts of 4-cyano-4- carbomethoxy-N-(o-methoxyphenyl)piperidine. The resultmg dyestufi 0f formula 15 dyes polyester fibres in claret-red shades (HT-process) having excellent fastness properties. -G H If the phenylpiperidines mentioned in column II are COOCKHB coupled as above with the diazonium compounds of the 1 0 H1 amines mentioned in column I, dyestulfs are obtained dyes polyester fibres in red shades (HT-process) having 20 which dye polyester fibres in the shades indicated in excellent fastness properties. column III.

III

Thermofix No. I II HT process process CN 1 2,6-dichlor04-nitro-aniline Reddish Reddish N H orange. Orange.

I COOC2H5 O CH; 2 2,4-dinitro-aniline Sameas above Bluigh-tinged Bluigh-tinged re re 2-methylsulphonyM-nitro-anilina. .do...

2,4-dinitro-6-brom-aniline do. 2-c1110ro4-methylsulphonyl-aniline ..do.

ON n 6 2,6-dlchloro-4-nitro-aniline Bluish-tmged Reddish N\ H red. orange. 1 o 0 0 CH, 0 CH:

7 2,4-dinitro-aniliue. Same as above Bluigh-tinged Blm'gh-tinged re re 8 2-methylsulphonylA-nitro-auiline do 9.- 2,4dinitro-6-brom-aniline .do. 10 2-ch10r0-4-nitro-aniline .do...

11 2-eyano-4-nltro-ani1ine ..do Claret 12 2,6-dichloroA-nitro-aniline I C O O C H; OCH:

13 2,4-dinitro-aniline Same as above 14... 2-methy1sulphony1-4-mtro-an1line.. do Pll'1k.... 15 2,4-dinitr0-fi-brom-aniline ..do Claret Claret.

CN 16 2-chloro4-nitro-auillue Red U o 0 0 CH: C

17 2-eyano-4-nitro-aniline Same as above Olare t; 18 2,6-dich1oro4nitro-aniline do Ygllowash- Brown.

mge re 19 2-methylsu1phonyl-4-nitro-aniline do Claret Violet. 2O 2-ehl0ro4-methylsulphonyl-auiline .do Orange Rgddisginge Orange. 21 2-br0m0-4-nitrO-G-eyan-aniline ..do Violet Violet.

CN 22 2-cl1lor04-nitro-ani1ine Red C O O OH:

23 2-cyan04-nitro-ani1ine Same as above Reddish- Claret.

tinged violetu COCH: 24 2'chloro-4-nitro-aniline Red CONHC|H 25 2-eyano-4-nitro-anlllne Same as above Reddish tinged violet.

TABLE-Con ti niued III Thermofix No. I II HT process process 61 Z-methylsulphonylA-xfitro-aniline Same as No. 56 Bluish-tinged Reddjshtinged tinged pink. violet. 62 2,4-dlIlltlO al'i111ne do Violet Violet. 63 2,4d.initro-6-ehlor-aniline do Bluish-tinged Bluish-tinged violet. violet. 64 2,4-dinitro-6-br0m-aniline do do Do. 65 i-nitro-aniline ..do Red Red.

CN 66 2-chloro-4-nitro-aniline Bluish-tinged -N H red. I C 0 O C H; NHC 0 CH:

67 2-eyan0-4-nitro-aniline Same as above- Violet Violet. 68 2-bromo-4-nitro-fi-oyan-aniline do Reddish- Reddishtinged blue. tinged blue. 69 2,6-dichioro-4-nitro-aniline do Bluigh-tinged Bluidsh-tinged re re 70 2-ehloro-4-methylsulphonyl-aniline do Reddish- Reddishtinged tinged orange. orange.

0 N 71... 2-eyono4-nitro nniline f 1 Bluish-tinged Bluish-tinged -N H red. red. L C O 1110 HiJ H 2 72 2-chloro4-nitro-aniline Same as above- Red Rod. 73 2,6-dichloro-4-nibro-aniline do Reddish- Reddishtinged tinged orange. orange.

74... 2-bromo4-nitro-fi-oyan-aniline do Bluish-tinged Bluish-tinged pink. pink.

75 2-chloro-4-methylsulphonyl-aniline do Orange Orange.

76 Z-methylsulphonyi-aniline ,dn Pink Pink.

77 4-nitro-Qniline ON Reddish- Reddishtinged tinged -N\ H orange; orange.

" C 0 O 02H;

78. 2-bromo-4-nitro-6-cyan-aniline Same as above Claret...; Claret.

2-chloro-4-nitro-6-eyan-aniline do do Do. 4-(2-chloro-4-nitrophenylazo)-aniline Yellowsh- Red.

inge red. 4-phenylazo-aniline... do Orange Brown; 4-(2,4dinitrophenylazo)-aniline.- do Brown Reddishtinged brown. 4-(4-nitrophenylazo)- nilin do .(10 Brown.

84 4-nitro-aniline ON Reddish- Reddishtinged tinged N\ H orange. orange.

C O O 02H; OCH;

85 2-bromo-4-nitro-fi-eyan-aniline Same as above Reddishtinged violet. 86 2-chloro4-nitro-fi-cyan-aniline....; m do r r do Do.

87 2-chloro-4-nitro-aniline CO CH; Blnish- Blnishtinged tinged -N H red. red.

' O O CH;

88 2-cyano-4-nitroaniiine. :-1: Same as above.. Reddish- Claret.

tinged violet.

89 2-methylsulphony1-4-n1tr0-aniline do.....'. do...: Bluishtinged red.

90 2ehloro-4-nitro-aniline CN Blliishtinged H red.

91 2-eyano-4-nitro-aniline Same as above Reddishtinged violet.

92 2,6-dich1oro4-nitro-aniline ..do Brown Brown.

9 2-ohloro-4-methylsulphonyl-anil do Orange Orange.

94 2,4-dinitro-fi-ehlor-aniliue OOH; 0N Blue....-:..:-;. Blue.

i C 00 CZHQ NHCOCQH;

23 EXAMPLE 21 1.5 parts of sodium nitrite are slowly added at C. to parts of concentrated sulphuric acid. parts by volume of a mixture of propionic acid and acetic acid (volume ratio 3:7) are added dropwise thereto. 2.73 parts of Z-amino-S-nitrothiazole are diazotised with this mixture and subsequently coupled analogously to Example 1 with the equivalent quantity of the coupling component of formula o 0 0 02115 CH3 The dyestuff of formula HO-N ON OzN- -N=N N H X is obtained which dyes polyesters fibres in blue shades from an aqueous dispersion.

If the phenyl-piperidines mentioned in column II are coupled as above 'with the diazonium compounds of the amines mentioned in column I dyestuffs are obtained which dye polyester fibres in the' shades indicated in column III.

' CN ClCHgCH HNOzS-O-N: .O i H cooozm dyes polyamide fibres, after treatment with alkali or fixing by heat, in orange shades having very good fastness properties.

If 4-amino-w-chloracetophenone is used as the diazo component, a dyestuif of similar properties is obtained.

EXAMPLE 23 4.57 parts of 4 aminophenacyltrimethylammonium chloride are dissolved in 20 parts of water and 7 parts by volume of concentrated hydrochloric acid are added. The solution is diazotised at 0-5 C. by adding 5 parts by volume of 4 N sodium nitrite solution. The solution is added at 0-5 C. to a solution of 5.16 parts of 4-cyano-4- carbethoxy-N-phenylpiperidine and 14 parts by volume of 111, HT I II process 1 /N ON Red.

C NH2 0000 H I 5 OzN- 2 .2 /N\ Same as above Red.

o-NH, HgC 01S 3 /N\ .do Red.

C-NH: 1ncaooo- 4 N M, ON lied:

o-Nm o 0 0 61H; on,)iNo,s-

5 N CN Rod;

C-Nllz NC I (100cm lfiI- lf Same as above Scarlet;

EXAMPLE 22 concentrated hydrochloric acid and parts of water.

5.38 parts of 4-amino-3-chlorobenzenesulpho-fl-chlorethylamide are triturated with 8 parts by volume of concentrated hydrochloric acid and diluted with parts of water. The solution is diazotised at 0-5 C. by adding 5 After completion of coupling the dyestuif is precipitated by adding salt and zinc chloride. The dyestulf is filtered 0 0E, redissolved in hot water and salted out from the filtrate after filtering the solution. The precipitated dyestuif of formula ZnGla (oHihNoHioo N=N-O@ ooocin.

is filtered off and dried. It dyes polyacrylonitrile fibers in orange shades having good fastness properties.

If the amines mentioned in column I in the table below are diazotised and coupled with the coupling components 26 suiting solution and the reaction mixture is stirred for a further 3 hours at -5 C. 7.5 parts of urea are added in portions to this diazo solution. The diazo solution thus obtained is added at 0-5 C. to a solution of 25.8 parts indicated in column II, dyestuffs are obtained which dye of -4-cyano-4-carbethoxy- N-phenylpiperidine in 150 parts acrylic fibres in the shades indicated in column III.

of alcohol. The'coupling mixture is rendered neutral to 1 e CN Orange.

O1 (CHahIII-CHzC 0- NH: O'N/ H NHCOOH: l

2 9 ea 0N Red.

Br (CIHB)ENCHIC O- N=N NH: O N H 6H: CN

8 e (B CO0C2H| Brown.

or orm nomco NH: 3 --N H coocnan 4 e (9 CN Red.

J (C2H5)2N(CH2)2HNOC NH:

N110 0 on.

5 (B CN Orange.

Br (CHahN-(CHrhHNOzS-O-NH:

t H H CONHCH1- 6 c1 OCH; Red.

01 monnmrrols-o-Nm ON: 11

' 000 0211; H3 HI 7 CI CN Brown:

H 019 ona N+-(CH2)2HN02S,NH| I 41H; C1 k s 9 CN Red.

C1H1S Os OzN- NH: O N/ H 00mm: & 000cm 9 9 CO CH: Red.

CHaS O4 OzN- NH:

H 0 oo 0 can,

I CH;

EXAMPLE 24 7.6 parts of sodium nitrite are scattered at 0 C. to C. in 90 parts of concentrated sulphuric acid and thereafter the mixture is heated to 65 C. until everything has dissolved and then cooled to 0 C., and 100 parts by volume of a mixture of glacial acetic acid and propionic acid, in the ratio of 6:1, are added dropwise.

,Congo Red by means of sodium acetate solution. After 19.4 parts of 6-ethoxy-2-aminobenzthiazole dissolved in parts by volume of a mixture of glacial acetic 'acid' and propionic acid (6:1) are added dropwise to the rev 2223 UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3 63, 5 9 Dated May 16, 1972 Invent01-( VED PARKASH KUBBA ET AL It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

r is "v Column 1, line 6, delete "CIBA Limited" and substitute CIBA-GEIGY AG Signed and sealed this 2nd day of April 197A.

(SEAL) Attest:

EDWARD M .FLETCHER,JR. C. MARSHALL DANN Attesting Officer Commissioner of Patents 

